3.
Disconnect the power from the computer by first unplugging the power cord from the AC outlet
and then unplugging the AC adapter from the computer.
4. Remove the battery (see
Battery on page 46).
5. Remove the primary hard drive cover (see
Primary hard drive cover on page 47).
6. Remove the following components:
a. Hard drive (see
Hard drive on page 48).
b.
Secondary hard drive (see
Secondary hard drive on page 50).
c. Optical drive (see
Optical drive on page 58).
d. Keyboard (see
Keyboard on page 60).
e. Top cover (see
Top cover on page 62).
f. Display assembly (see
Display assembly on page 68).
g. System board (see
System board on page 78).
h. USB board (see
USB board on page 81).
Remove the fan/heat sink assembly:
NOTE: Steps 1 through 4 apply only to models with discrete subsystem memory on the system board.
See steps 5 through 8 apply only to models with UMA subsystem memory on the system board.
1. Turn the system board upside down, with the expansion port and external monitor port toward
you.
2. Loosen the seven PM2.5×3.0 Phillips captive screws (1) that secure the fan/heat sink assembly to
the system board.
90 Chapter 4 Removal and replacement procedures ENWW
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